Re: mac99 SMP

[Andrew Randrianasulu]

On Mon, Mar 10, 2025 at 11:37 PM BALATON Zoltan <balaton@eik.bme.hu> wrote:
>
> On Mon, 10 Mar 2025, Andrew Randrianasulu wrote:
> > вс, 9 мар. 2025 г., 15:36 BALATON Zoltan <balaton@eik.bme.hu>:
> >> On Sun, 9 Mar 2025, Howard Spoelstra wrote:
> >>> On Sun, Mar 9, 2025 at 12:38 PM Andrew Randrianasulu <
> >> randrianasulu@gmail.com> wrote:
> >>>>>> I also noticed that  default gtk3 display tend to "freeze" mouse in
> >> SMP OS
> >>>>>> 9.2.2 guest, but -display sdl worked fine so far. Set up host ftp
> >> server
> >>>>>> for file transfers.
> >>>>>
> >>>>> Maybe Howard would be interested in that. But I think his builds also
> >> use
> >>>>> SDL, but seen this problem on Windows and macOS not Linux.BALATON
> >> Zoltan
> >>>>
> >>>>
> >>> On Windows host: with smp SDL also freezes after some time: we loose
> >> either
> >>> mouse clicks or movement.
> >>> The via=pmu defaults to using usb kbd/mouse. via=pmu-adb provides the pmu
> >>> but with adb kdb/mouse. That doesn't seem to crash.
> >>> To make things more complicated: OSX 10.0 and 10.1 will have no mouse
> >> when
> >>> running with via=pmu. This seems due to some USB problem, so even when
> >> the
> >>
> >> We have debugged this USB problem a few years ago and I think the problem
> >> was that those early OSX versions try to detect devices by powering the
> >> ports down and up and expect connected events from connected devices but
> >> QEMU does not emulate port power management so these connect events won't
> >> be generated. It could be fixed but I haven't written a patch and hoped
> >> somebody else would do that but it seems nobody did so far. It shouldn't
> >> be too hard, just need to get acquainted with the code in
> >> qemu/hw/usb/hcd-ohci.c, read the OHCI docs and implement the bits that
> >> power down the port and generate connect events when the port is powered
> >> up. Somebody who's interested to fix this could do that. This info was on
> >> the list back when we debugged it too so already known for a few years.
> >>
> >
> >
> > Do you think it should be put in official qemu bugtracker, if not already?
> > I mean usb power up/down for OHCI ?
> >
> > Should screamer patch get its tracking bug too?
>
> I don't know if anybody cares about the QEMU bugtracker for these
> machines. The maintainer is Mark and he's aware of the problems just
> doesn't have time to do much about them. Not sure having a bug would
> change that. (Maybe he forgot about this USB issue but now reminded :-) )
>
> > Any other bugs/incomplete features?
>
> Probably a lot of them, some may already have tickets but who will fix
> them?
>
> > Semirelated - does g3 machine works for you right now? I think I got
> > blackscreen but may be it was  just messed up by me ....
>
> Haven't tried for a while but maybe the patched openbios does not work
> with it in case you replaced that in pc-bios?

Yeah, seems to be just
 ./qemu-system-ppc -M g3beige works

and

./qemu-system-ppc -M g3beige -bios ~/K38_sdcard1/Documents/openbios-qemu-smp.elf

not ....

>
> Regards,
> BALATON Zoltan